Modern electronics/connectors...

[GAD]

My experience of the Z80 was my brother's Sinclair ZX Spectrum, which sold in huge numbers in the UK. A mighty 16K of RAM and software was loaded using a cassette player. Great fun! Sold in America under the Timex Sinclair brand (Timex were also the main manufacturer for Sinclair in Britain), but nowhere near as successful.

I remember them well! In fact I have a kit to build a clone!

 

[steve488]

Back in the late '70s I worked on a system that had up to 5 Z80's in it. For diagnostics we had to plug in a 50 pin cable on the buss and take control of the clock. We could then either step through the existing code or hand enter instructions to trace specific problems. Early versions of the system loaded using a cassette drive but the later ones upgraded to 8" floppy disks.......